Grinding device



Feb. 9, 1937. H. J. PERAZZOLI GRINDING DEVICE Filed Oct. 25, 1954 3 Sheets-Sheet l Feb. 9, 1937.

H. J. PERAZZOLI GRINDING DEVICE Filed Oct. 25, 1934 3 Sheets-Sheet 2 u k 5 x a r6 L -J J J J5 A9 A9 26 23 20 z a? y 6 WWW H. J. PERAZZOLI GRINDING DEVICE Feb, 9, 1937.

3 Sheets-Sheet 3 Filed Oct. 25, 1934 Patented Feb. 9, 1937 Uiti'iifl YES ATENT OFFICE Application October 25,

17 Claims.

This invention relates to new and useful improvements in grinders and more particularly to grinders for the traction surfaces of railway track rails and the like.

The principal object of the invention is to provide an apparatus or device of the character set forth, having novel abrasive means operatively associated therewith to permit relatively high grinding speeds e d at the same time effectually grind a substan" iy large area of the traction surface of the rail.

A further object of the invention is to provide a device of the character set forth having novel abrsive means associated therewith in the form of an endless chain of abrasive or grinding bricks.

A further object of the invention is to provide device of the character set forth having novel abrasive comprising a continuous chain of pivotally connected bracket elements and abrasive elements removably mounted therein.

Certain other objects and features of the inventic-n and the details of the construction thereof are set forth hereinafter and shown in the accompanying drawings, in which:

1 is a view in side elevation showing a porn a grinding device with the abrasive mechafcrming the subject of the present invention a ciated therewith.

g. 2 an enlarged view in section taken sub- 11y on line 2-2, Fig. 1.

Fig. 3 is a view perspective of one of the brackets in which the abrasive bricks are mounted.

Fig. i is a View in perspective of a brick having a head associated therewith for mounting in the l t disclosed in Fig. 3.

5 a View in perspective of the means for the abrasive element in operative relation itn its supporting bracket; and

Fig. 6 is a view in section longitudinally through the series of pivotaliy connected brackets mounted therein.

Heretofore, devices of the present character for grinding the surfaces of track rails have in almost every instance been provided with abrasive elements of the circular rotating disk or reciprocating brick type. In the former or rotating disk type of abrasive element, while relatively high 7 1934, Serial No. 749,974

ing bricks are highly restricted because of the periodic alternate change in the direction of movement thereof.

By the present invention the provision of an endless chain of connected abrasive elements in the manner disclosed herein, permits maximum grinding speeds and at the same time enables a substantially large surface area of the track rails to be ground or finished.

Referring now more particularly to the drawings, reference numerals l, I designate the longitudinal frame members of the customary railway track grinder disposed in parallel spaced relation adjacent one side of the machine as shown in Fig. 2, and members 2 are secured between said frame members I, transversely with respect thereto by means of bolts 3, the said members 2 being relatively spaced apart with respect to each other as shown in Fig. 1. Tubular sleeve bearings 4 are mounted vertically in the members 2 adjacent the 20 transverse ends thereof inwardly of the longitudinal frame members I of the grinding machine.

In the present instance rods 5 are slidably mounted in the sleeve bearings 4 and have their upper ends secured in a common element or plate 25 6 by means of bolts 1. Jack screws 8 are threaded in sleeves 9 mounted in the member 6 and have their lower ends connected to the transverse members 2. The threads of the jack screws 8 are meshed with the internal threads of worm 30 wheels 10, mounted at the upper side of the member 6, and each worm wheel I0 is arranged to engage a, worm ll mounted upon a shaft l2 which is journalled in bearings l3 secured to the top of the members 6 by means of one of each of the pairs of aforementioned bolts l. As shown in Fig. 1 of the drawings the shaft, 12 may be rotated from either end thereof by means of hand wheels I4.

The lower ends of each pair of slidable rods 5 constitute supports l5 and I6 respectively for a shaft or axle ll rotatably journalled in the former support l5 by means of a bearing I8 and in the support It by means of a pair of roller bearings is relatively separated by means of sleeves 20. A sprocket 2! is mounted on the outer or left-hand end of the shaft H with respect to Fig. 2 and secured thereon by means of a nut 22, the said shaft I! being secured against longitudinal displacement at its other end by means of a washer 23 and nut 24.

A plate or arm 25 extends between the lower end portions l6 of the corresponding slidable rods 5 and the lower ends l5 of the slidable. rods 5 at the other ends of the members 2. Aplurality of-the plates 25 and are disposed vertically with respect thereto in relatively spaced relation. Up-

perand lower transverse plates 21 and 28 respectively are secured substantially horizontally between the sets of'supporting members 26 adjacent the upper and lower ends thereof by .means of bolts 29.

Also secured to the sets of supporting members 26 are upper and lower sets of longitudinal'guide channels 30 and 3|.

A drum 32 is keyed to each of the shafts I! for rotation therewith and sprockets 34 are also mounted on said shaft I! at each side of the drum 32 and secured to the latter by means of bolts 35. It will be noticed 'by reference to Fig. 1 of the drawings that the aforementioned upper and lower horizontal plates 21 and 28 extend between the drums 32 and are so arranged that their end portions are disposed tangentially with respect to the circumference of the said It will further be noted that as seen in Figure 1, the endportions of the lower guide 28 are slightly inclined with reference to the drums.

together by means of links 31, extends about the drums 3;. and is adapted to ride through its lateral extent upon theoutward surfaces of the upper and lower transverse plates 2! and 28. An outer chain B is adapted to ride upon the con-' tiguous roller chain previously described and comprises a series of bracket elements 38 having oblique undercut portions 39. extending transversely at theunderside thereof, and a projection 40 at one end of the bracket of less width than said bracket; the said projection having a rounded external surfacea's at Hand being provided with a transverse bore 42" located centrally with respect to the saidprojection 40.

withspaced projections 43 havingaligned aper; tures 44 therein,.so' positioned as to align with the bore 42 in the projection 40 of the next succeeding bracket 38 when in'substantially abutting or contiguous relation. A pin 45 is passed through 5- 5 ,engagement by the teeth of the sprocket the apertures '44- in theprojections 43 andthe bore 42 in the projection 40 ofthe next succeeding bracket 38 to pivotally connect the same together to form anendless chain as indicated and shown in Fig. 1 of the drawings.

' o In the present instance rollers46, having circumferentially projecting flanges 41, are mounted upon every fourth pivot pin 45 and arranged for wheels 34 previously described. Rollers49 are also mounted upon these same pivot pins 45 at the ends thereof and outwardly with respect to the aforementioned rollers 46.: In the present instance therollers 49' are rotatably mounted upon the pivotpins 45 by means of roller bearing assemblies 50, and are adaptedto'travel in the sets of the upper and lower guide channels 3D and 3! respectively during travel of the outer chain through its substantially horizontal extents intermediate the drums 32.

Movement issupplied to the chains -A' andB previously described by one of the drums 32 and its associated sprockets 34 respectively mounted on one of the shafts l1, through the sprocket 2| from a motor M mounted upon the The opposite ends of the brackets 38 are provided 54 the sides of which are undercut as at 55, the

said projection 54 and the undercut sides 55 thereof having such dimensions as to permit the same to fit snugly within the undercut recess 39 formed in the outer surfaces of bracket elements 7 38.. With the abrasive brick and its integral cap 53 mounted in the undercut recess 39 of the bracket 38 the same is secured therein by means of a downwardly projecting lug 56 held in retaining position by means of a bolt 51 which may be screwed into the threaded opening 58 in that side of the bracket 38 which will be at the outside of the mechanism with respect to the rails [of the track, so that the abrasive element may at the will of be readily removed and replaced the operator of the machine. 7

The abrasive elements 52 may be adjusted relatively with respect to the traction surface of the track rails byrotation of the shaft 1 2Vby the hand wheels I4 in alternate directions, thus raising or lowering the jack screws 8 and" in turn the rods channels 30 and 3| extending; horizontally betweenthedrums 32 at the upper and lower sides thereof function to insure uniform contact pressure of the abrasive elements 52 in accordance with the degree of pressure as desired and regue lated by means of the adjustment of the jack' screws 8. r 7

.As hereinbefcrenoted, theend portions of guide 28 are inclined downwardly from the points of tangency with drums32. By virtue of this conbring out the advantage of this arrangement it might be noted that ifguide 28 were straight throughout its length, each brick in moving from this straight guide onto the drum 32, or vice versa,

" would become rather sharply cocked or angled, in

consequence of which the advance and'rear edges of the bricks would very rapidlybecome worniand therefore wouldnot present a flat surface for contact with the rail during travel of the bricks along the portion of the guide 28 intermediate its angled ends; 1 Y

just above, this grinding equipment in effect combines the action of a planer (in the region of the straight intermediate portion of guide 28) and the action of a rotating abrasive wheel (in theregion of the drums 32).

While the details of construction and specific features of the invention have been set forth for the purpose of description, it is not intended that ture, a second frame structure supported by said main frame structure, drums rotatably mounted 1 Itmight further be noted thatbecause'of the V V arrangement shown in Figure 1 and referred to in said second frame structure in spaced relation,

to each other, a sprocket mounted coaxially'with one of said'drums, horizontal plates mounted on 1 the second frame structure and extending tangentially between the drums at'the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and the intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets in the outer carrier, means on certain of said pivots arranged for engagement by the teeth of the sprocket, upper and lower guide means, means mounted on certain of said pivot pins arranged to cooperate with said guide means, abrasive elements mounted in the brackets of the outer chain, and means for actuating at least one of the drums to drive the carrier.

2. In a grinding device, a main frame structure, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation to each other, sprocket associated with one of said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets of the outer carrier, means on certain of said pivots arranged for engagement by the teeth of the sprocket, upper and lower guide means, abrasive elements mounted in the brackets of the outer chain, and means for actuating the sprocket to drive the carrier.

3. In a grinding device, a main frame structure, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation toeach other, sprocket associated with one of said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets of said outer carrier, means on certain of said pivots arranged for engagement by the teeth of the sprocket, abrasive elements mounted in the brackets of the outer chain, and means for actuating the sprocket to drive the carrier.

4. In a grinding device, a main frame struc ture, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation to each other, sprocket associated with one of said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets in the outer carrier, upper and lower guide means, means mounted on certain of said pivot pins arranged to cooperate with said guide means, abrasive elements mounted in the brackets of the outer chain, and means for actuating the sprocket to drive the carrier.

5. In a grinding device, a main frame structure, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation to each other, sprockets associated with said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless carrier including a plurality of brackets arranged to travel about the drums, pivots connecting the brackets in the carrier, means on certain of said pivots arranged for engagement by the teeth of the sprockets, upper and lower guide means, means mounted on certain of said pivot pins arranged to cooperate with said guide means, abrasive elements mounted in the brackets of the carrier, and means for actuating at least one of the drums and its associated sprocket to drive the carrier.

6. In a grinding device a main frame structure, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation to each other, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets in the outer carrier, upper and lower guide means, means mounted on certain of said pivot pins arranged tocooperate with said guide means, abrasive elements mounted in the brackets of the outer chain, and means for actuating at least one of the drums to drive the carrier.

'7. In a grinding device, a main frame structure, a second frame structure supported by said main frame structure, drums rotatably mounted in the second frame structure in spaced relation to each other, a sprocket associated with one of said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets in the outer carrier, means on certain of said pivots arranged for engagement by the teeth of the sprocket, upper and lower guide means, means mounted on certain of said pivot pins arranged to cooperate with said guide means, abrasive elements mounted in the brackets of the outer chain, and means for acuating the sprocket to drive the carrier.

8. In a grinding device, a main frame structure, a second frame structure supported by said main frame structure, means for adjusting the second frame vertically with respect to the main frame, drums rotatably mounted in the second frame structure in spaced relation to each other, sprocket associated with one of said drums and rotatable therewith, horizontal plates mounted on the second frame structure and extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on said drums and intermediate plates, an outer endless carrier including a plurality of brackets arranged to travel on the chain of rollers, pivots connecting the brackets in the outer carrier, means on certain of said pivots arranged for engagement by the teeth of the sprocket, upper and lower guide means, means mounted on certain of said. pivot pins arranged to cooperate With said guide means, abrasive elements mounted in thebrackets of the outer chain, and means for actuating the sprocket to drive the carrier.

9. In a grinding device, the combination with drums rotatably mounted in spaced relation to 10. In a grinding device, the combination with drums rotatably mounted in spaced relation to each other and horizontal plates extending tangentially between the drums at the top and bottom thereof, of an endless chain of rollers arranged to travel on smd drums and the intermediate plates, an outer endless carrier arranged to travel on the chain of rollers, and abrasive elements carried by said outer endless carrier. 7

11. In a grinding device the combination with drums rotatably mounted in spaced relation to each other, of sprockets associated with said drums and rotatable therewith, horizontal plates extending tangentially between the drums at the top and bottom thereof, an endless carrier arranged to travel about the drums and said intermediate plates, means onsaid endless carrier arranged for engagement by the teeth of the sprockets, guide means, means on certain of :said means engaged by the teeth of the sprockets arranged to cooperate with said guide means,'and means for actuating at least one of thedrums and associated sprocket to drive the carrier.

12. In a grinding device the combination with V drums rotatably mounted in spaced relation to each other, of sprockets associated with said rums and rotatable therewith, horizontal plates extending tangentially between the drums at the top and bottom thereof, an endless chain of rollers arranged to travel on the drums and said intermediate plates, an outer endless carrier arranged to travel on said chain of rollers, means on said endless carrier arranged for engagement by the teeth'of the sprockets, guide means, means on certain of said means engaged by the teeth of the sprockets arranged to cooperate with said guide means, and meansiior actuating at least one of the drums and associated sprocket to drive the carrier.

13. A grinding device including a pair of members mounted in spaced relation and having drum surfaces, a chain of rollers surrounding said members and adapted to ride on said surfaces, an endless carrier adapted to ride on the rollers of said chain, abrasive means carried by said carrier, and means engaging said carrier to efiect movement thereof.

14. A grinding device including a pair of members mounted in spaced relation and having drum surfaces, a chain of, rollers surrounding said members and adapted to ride on said surfacea'an endless carrier adapted to ride on the rollers of said chain, the ,carrierincluding a plurality of brackets with pivot means therebetween, abrasive means carriedrby said brackets, and means for actuating the carrier including a driving element engaging said pivot means. i V

15. For an endless abrasive-brick carrier, a bracket member having means for pivotal attachment thereto with other similar brackets in the carrier, an abrasive device comprising abrasive material and a supporting member, the supporting and bracket members being provided with separable interlocking portions, whereby the abrasive device may be removed from the bracket member, and a displaceable element normally preventing separation of said bracket and supporting members.

16. In a machine for grinding a rail of a trackway, a frame structure for supporting the machine in rail grinding position, a pair of spaced support members adjustably carried by the frame structure for movement toward and away from the rail to be ground, an endless carrier surrounding said members, a series of separate abrasive devices mounted on the carrier, the support members being curved to provide curved rims in the path of movement of the carrier, guide means providing a straight run for the carrier adjacent said rail and below a' position of tangency with respect to the curved runs,v an end of said guide means being terminated in spaced relation with respect to a curved run to 'providea run which is inclined with respect to the rail at a low angle, and guide means for the inclined vide curved runs in the path of movement of the carrier, guide means providing a straight run for the carrier adjacent said rail and below a position of tangency with respect to the curved runs, an end of said guide means beingterminated in spaced relation with respect to a c'urved'run to provide a run which is inclined with respect to the rail at a low angle, and guide means for the ins clined run of said carrier.

V HENRY J. PERAZZOLI.

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